18 August 1868 August 17, 2012 Author: Staff Helium is discovered by the French astronomer Pierre Jules César Janssen Famous Words of Inspiration..."He who learns but does not think, is lost! He who thinks but does not learn is in great danger." Confucius — Click here for more from Confucius Related posts: 28 July 1868 18 August 1976 Categories: History Tags: 18 August, 1868